Alert archive / Illinois / Flash Flood Watches

Flash Flood Watches in Illinois, 2021

23 flash flood watches in 2021. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of flash flood watches reaches back to 2005.

Flash Flood Watches by county

Each county as a circle sized by its count in 2021. Tap one for its archive.

Flash Flood Watches
23
Busiest month
June8 flash flood watches
Busiest day
June 28, 20214 flash flood watches

Over time

By month

The alerts

Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeCountiesLasted
Mar 17, 2:21 AM CDTFlash Flood WatchPAHAlexander, Franklin, Hamilton, Jackson, Jefferson, Johnson and 8 more23 hr
Mar 17, 2:49 AM CDTFlash Flood WatchLSXRandolph, Washington22 hr
Apr 27, 2:28 PM CDTFlash Flood WatchLSXClinton, Marion, Monroe, Randolph, Saint Clair, Washington39 hr
Apr 27, 3:11 PM CDTFlash Flood WatchPAHAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more45 hr
Apr 28, 2:37 AM CDTFlash Flood WatchILXClay, Lawrence, Richland28 hr
May 17, 9:22 PM CDTFlash Flood WatchILXSangamon13 hr
Jun 23, 2:00 PM CDTFlash Flood WatchLSXAdams, Brown, Calhoun, Greene, Jersey, Macoupin and 3 more3 days
Jun 24, 2:08 PM CDTFlash Flood WatchDVNBureau, Hancock, Henderson, Henry, McDonough, Mercer and 4 more54 hr
Jun 24, 2:19 PM CDTFlash Flood WatchLOTCook, DeKalb, DuPage, Ford, Grundy, Iroquois and 7 more54 hr
Jun 24, 2:28 PM CDTFlash Flood WatchILXCass, Champaign, Christian, Coles, DeWitt, Douglas and 21 more54 hr
Jun 28, 3:01 AM CDTFlash Flood WatchLOTBoone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more40 hr
Jun 28, 3:13 AM CDTFlash Flood WatchILXCass, Fulton, Knox, Logan, McLean, Marshall and 10 more40 hr
Jun 28, 3:19 AM CDTFlash Flood WatchDVNBureau, Carroll, Hancock, Henderson, Henry, McDonough and 6 more38 hr
Jun 28, 3:54 AM CDTFlash Flood WatchLSXAdams, Brown, Pike39 hr
Jul 9, 2:49 AM CDTFlash Flood WatchDVNHancock, Henderson, McDonough, Warren40 hr
Jul 9, 2:49 AM CDTFlash Flood WatchILXCass, Christian, Clark, Clay, Coles, Crawford and 16 more43 hr
Jul 9, 2:53 AM CDTFlash Flood WatchLSXAdams, Bond, Brown, Calhoun, Clinton, Fayette and 11 more47 hr
Jul 10, 2:21 AM CDTFlash Flood WatchPAHAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more25 hr
Aug 12, 12:44 PM CDTFlash Flood WatchDVNHancock, Henderson, McDonough, Warren8 hr
Aug 26, 5:50 PM CDTFlash Flood WatchDVNCarroll, Jo Daviess13 hr
Oct 23, 12:46 PM CDTFlash Flood WatchLOTCook, DuPage, Ford, Grundy, Iroquois, Kankakee and 4 more38 hr
Oct 23, 12:50 PM CDTFlash Flood WatchILXCass, Champaign, DeWitt, Douglas, Fulton, Knox and 13 more56 hr
Oct 23, 12:53 PM CDTFlash Flood WatchDVNBureau, Hancock, Henderson, Henry, McDonough, Mercer and 3 more38 hr

By county

Every county with at least one alert. A county page lists each alert that covered it.

62 more counties

The busiest days

Days with the most alerts issued, by UTC date.

  1. June 28, 20214flash flood watches
  2. June 24, 20213flash flood watches
  3. July 9, 20213flash flood watches
  4. October 23, 20213flash flood watches
  5. March 17, 20212flash flood watches
  6. April 27, 20212flash flood watches
  7. April 28, 20211flash flood watches
  8. May 18, 20211flash flood watches
  9. June 23, 20211flash flood watches
  10. July 10, 20211flash flood watches
  11. August 12, 20211flash flood watches
  12. August 26, 20211flash flood watches

Nearby

Alerts in force nowTornadoes on recordThe radar archive20202022

Sources

National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Rebuilt daily.